//
//  CoreDataHelper.m
//  iFly
//
//  Created by User-10 on 12/10/14.
//  Copyright (c) 2014 TeamDifferent. All rights reserved.
//

#import "CoreDataHelper.h"
#import "Constants.h"

@interface CoreDataHelper ()

@property NSMutableArray* players;

@end

@implementation CoreDataHelper

static BOOL isInited = NO;

+(id) sharedCoreDataHelper {
    static CoreDataHelper* cd = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        cd = [[super alloc] init];
    });
    
    return cd;
}

+(instancetype)alloc {
    return [CoreDataHelper sharedCoreDataHelper];
}

- (instancetype)init {
    if (isInited) {
        return self;
    }
    
    self = [super init];
    if (self) {
        
        NSLog(@"CoreDataLoaded");
        self.players = [[NSMutableArray alloc] init];

        isInited = YES;

    }
    return self;
}

-(id)copy {
    return [CoreDataHelper sharedCoreDataHelper];
}

-(id)mutableCopy {
    return [CoreDataHelper sharedCoreDataHelper];
}

-(void)loadData {
    NSFetchRequest* fetchRequest = [NSFetchRequest fetchRequestWithEntityName:@"Player"];
    NSSortDescriptor* descriptor = [[NSSortDescriptor alloc] initWithKey:@"score" ascending:NO];
    [fetchRequest setSortDescriptors:@[descriptor]];
    
    self.players = [self.managedObjectContext executeFetchRequest:fetchRequest error:nil];
}

//functions for handling data

-(NSMutableArray*) getPlayersInDescendingOrder {
    [self loadData];
    return self.players;
}

+(BOOL) checkMinScore:(NSInteger) score {
    NSMutableArray* players = [[self sharedCoreDataHelper] getPlayersInDescendingOrder];
    Player* last = players.lastObject;
    if (score >=[last.score integerValue] || [players count] < numberOfHighScores) {
        return YES;
    }
    else {
        return NO;
    }
}

-(void) addPlayerWithName:(NSString*) name andScore:(NSNumber*) score; {
    if ([self.players count] >= numberOfHighScores) {
        Player* player=[self.players lastObject];
        [self.managedObjectContext deleteObject:player];
        [self saveContext];
        
    }
    Player* playerToAdd = [NSEntityDescription insertNewObjectForEntityForName:@"Player" inManagedObjectContext:self.managedObjectContext];
    playerToAdd.name = name;
    playerToAdd.score = score;
    [self saveContext];
    NSLog(@"Player: %@ with score: %@ added to core data",name, score);
}


#pragma mark - Core Data stack

@synthesize managedObjectContext = _managedObjectContext;
@synthesize managedObjectModel = _managedObjectModel;
@synthesize persistentStoreCoordinator = _persistentStoreCoordinator;

- (NSURL *)applicationDocumentsDirectory {
    // The directory the application uses to store the Core Data store file. This code uses a directory named "TD.Core" in the application's documents directory.
    return [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
}

- (NSManagedObjectModel *)managedObjectModel {
    // The managed object model for the application. It is a fatal error for the application not to be able to find and load its model.
    if (_managedObjectModel != nil) {
        return _managedObjectModel;
    }
    NSURL *modelURL = [[NSBundle mainBundle] URLForResource:@"Core" withExtension:@"mom"];
    _managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL];
    return _managedObjectModel;
}

- (NSPersistentStoreCoordinator *)persistentStoreCoordinator {
    // The persistent store coordinator for the application. This implementation creates and return a coordinator, having added the store for the application to it.
    if (_persistentStoreCoordinator != nil) {
        return _persistentStoreCoordinator;
    }
    
    // Create the coordinator and store
    
    _persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]];
    NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:@"Core.sqlite"];
    NSError *error = nil;
    NSString *failureReason = @"There was an error creating or loading the application's saved data.";
    if (![_persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeURL options:nil error:&error]) {
        // Report any error we got.
        NSMutableDictionary *dict = [NSMutableDictionary dictionary];
        dict[NSLocalizedDescriptionKey] = @"Failed to initialize the application's saved data";
        dict[NSLocalizedFailureReasonErrorKey] = failureReason;
        dict[NSUnderlyingErrorKey] = error;
        error = [NSError errorWithDomain:@"YOUR_ERROR_DOMAIN" code:9999 userInfo:dict];
        // Replace this with code to handle the error appropriately.
        // abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
        NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
        abort();
    }
    
    return _persistentStoreCoordinator;
}


- (NSManagedObjectContext *)managedObjectContext {
    // Returns the managed object context for the application (which is already bound to the persistent store coordinator for the application.)
    if (_managedObjectContext != nil) {
        return _managedObjectContext;
    }
    
    NSPersistentStoreCoordinator *coordinator = [self persistentStoreCoordinator];
    if (!coordinator) {
        return nil;
    }
    _managedObjectContext = [[NSManagedObjectContext alloc] init];
    [_managedObjectContext setPersistentStoreCoordinator:coordinator];
    return _managedObjectContext;
}


#pragma mark - Core Data Saving support

- (void)saveContext {
    NSManagedObjectContext *managedObjectContext = self.managedObjectContext;
    if (managedObjectContext != nil) {
        NSError *error = nil;
        if ([managedObjectContext hasChanges] && ![managedObjectContext save:&error]) {
            // Replace this implementation with code to handle the error appropriately.
            // abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
            NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
            abort();
        }
    }
}



@end
